/*

 * Licensed to the Apache Software Foundation (ASF) under one

 * or more contributor license agreements.  See the NOTICE file

 * distributed with this work for additional information

 * regarding copyright ownership.  The ASF licenses this file

 * to you under the Apache License, Version 2.0 (the

 * "License"); you may not use this file except in compliance

 * with the License.  You may obtain a copy of the License at

 *

 *     http://www.apache.org/licenses/LICENSE-2.0

 *

 * Unless required by applicable law or agreed to in writing, software

 * distributed under the License is distributed on an "AS IS" BASIS,

 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

 * See the License for the specific language governing permissions and

 * limitations under the License.

 */

package com.bff.gaia.unified.runners.core.construction;



import com.bff.gaia.unified.model.pipeline.v1.RunnerApi;

import com.bff.gaia.unified.sdk.Pipeline;

import com.bff.gaia.unified.sdk.coders.Coder;

import com.bff.gaia.unified.sdk.values.PCollection;

import com.bff.gaia.unified.sdk.values.PCollection.IsBounded;



import java.io.IOException;



/**

 * Utility methods for translating {@link PCollection PCollections} to and from Runner API protos.

 */

public class PCollectionTranslation {

  private PCollectionTranslation() {}



  public static RunnerApi.PCollection toProto(PCollection<?> pCollection, SdkComponents components)

      throws IOException {

    String coderId = components.registerCoder(pCollection.getCoder());

    String windowingStrategyId =

        components.registerWindowingStrategy(pCollection.getWindowingStrategy());

    // TODO: Display Data



    return RunnerApi.PCollection.newBuilder()

        .setUniqueName(pCollection.getName())

        .setCoderId(coderId)

        .setIsBounded(toProto(pCollection.isBounded()))

        .setWindowingStrategyId(windowingStrategyId)

        .build();

  }



  public static PCollection<?> fromProto(

      RunnerApi.PCollection pCollection, Pipeline pipeline, RehydratedComponents components)

      throws IOException {



    Coder<?> coder = components.getCoder(pCollection.getCoderId());

    return PCollection.createPrimitiveOutputInternal(

        pipeline,

        components.getWindowingStrategy(pCollection.getWindowingStrategyId()),

        fromProto(pCollection.getIsBounded()),

        (Coder) coder);

  }



  public static IsBounded isBounded(RunnerApi.PCollection pCollection) {

    return fromProto(pCollection.getIsBounded());

  }



  static RunnerApi.IsBounded.Enum toProto(IsBounded bounded) {

    switch (bounded) {

      case BOUNDED:

        return RunnerApi.IsBounded.Enum.BOUNDED;

      case UNBOUNDED:

        return RunnerApi.IsBounded.Enum.UNBOUNDED;

      default:

        throw new IllegalArgumentException(

            String.format("Unknown %s %s", IsBounded.class.getSimpleName(), bounded));

    }

  }



  static IsBounded fromProto(RunnerApi.IsBounded.Enum isBounded) {

    switch (isBounded) {

      case BOUNDED:

        return IsBounded.BOUNDED;

      case UNBOUNDED:

        return IsBounded.UNBOUNDED;

      case UNRECOGNIZED:

      default:

        // Whether or not this enum cannot be recognized by the proto (due to the version of the

        // generated code we link to) or the switch hasn't been updated to handle it,

        // the situation is the same: we don't know what this IsBounded means

        throw new IllegalArgumentException(

            String.format(

                "Cannot convert unknown %s to %s: %s",

                RunnerApi.IsBounded.class.getCanonicalName(),

                IsBounded.class.getCanonicalName(),

                isBounded));

    }

  }

}